Biology
High School (9–10)
General
Human Body › Nervous System and Sense OrgansPlant Biology › Plant Hormones and MovementsHuman Body › Hormones and the Endocrine SystemChapter 5Control and Coordination
You pull your hand away from a hot pan before you even think about it. A plant on a windowsill bends towards the light. Both are living things responding to a change around them. In this chapter you see how nerves carry messages in animals, how a reflex works, what the parts of the brain do, how plants respond without nerves, and how hormones control growth in plants and animals. Python helps you time reflexes and model hormone levels.
Part of Biology · High School (9–10) (chapter 5)
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The Nervous System
Follow a message along a nerve cell and across a synapse. See why a reflex is so fast, and what the forebrain, midbrain, hindbrain and spinal cord each do.
Coordination in Plants and Hormones in Animals
Plants respond to light, gravity, water and touch, and their hormones control growth. In animals, glands release hormones that control growth, sugar and the body's response to danger.